AIDS-131904 AIDS131904 NSC624914 Triethyl 6,7-dihydrobenzo[h]pyrrolo[2,1-f][1,6]naphthyridine-5,6,7-tricarboxylate {6,7-Dihydro-5,6,7-tricarboethoxy-1,8-diazopyrrolo[2,} 1-f\]phenanthrene